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Everything about Generics in Java

Features of the Java programming language

Generics are a facility of generic programming that were added to the Java programming language in 2004 within version J2SE 5.0. They were designed to extend Java's type system to allow "a type or method to operate on objects of various types while providing compile-time type safety". The aspect compile-time type safety required that parametrically polymorphic functions are not implemented in the Java virtual machine, since type safety is impossible in this case. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Generics in JavaA 5-minute orientation
  2. Pick up a classic book: Clean CodeThe most-reprinted book on the subject
  3. Go sideways: Java syntaxA closely related topic
  4. Go sideways: Wildcard (Java)A closely related topic

đź“– Definitions

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🗂️ The subject at a glance

  1. Hierarchy and classification
  2. Motivation
  3. Generic class definitions
  4. Generic method definitions
  5. Diamond operator
  6. Type wildcards
  7. Generics in throws clause
  8. Problems with type erasure
  9. Differences from Arrays
  10. Project on generics

🏆 Landmark papers (most cited)

đź“š Books worth reading

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đź”— Related topics